Table 3.

Correlation coefficients for the relationship between plasma cotinine and 3HC with daily dose of nicotine (n = 36)

Plasma analyte8 a.m.12 noon4 p.m.8 p.m.12-h average
Cot0.690.690.760.790.75
3HC0.830.800.820.800.83
Cot + 3HC0.790.780.830.840.82

NOTE: All values were significant at <0.0001.